TABLE 3 The Relationship of Age to Men's Advice Favorable to Migrating from Cedral, Mexico, to the City, 1967 Age Category Percent "very much in agreement" or "in agreement" Number Percent saying go to the city Number Percent saying go to the city Number 15-24 25-34 3544 45+ Total 53. "Do you think that to be able to progress the best thing that can be done by a man of your age who lives in a village (pueblo) like Cedral is to go to a city as soon as possible?" 77 69 52 42 59 (69) (100) (77) (101) (347) 54. "And in the case of a man older than yourself, what do you think is best?" (Only for respondents less than 55 years old.) 37 (52) 35 (81) 29 (69) 23 (57) 31 (259) 55. "And in the case of a man younger than yourself, what do you think is best?" (Only for respondents over 25 years old.) 91 (88) 92 (74) 92 (109) 92 (271) Source: Unpublished data, Cedral survey, Population Research Center, Department of Sociology, University of Texas, Austin. this assertion was based on his studies of Great Britain and, to a lesser extent, Europe. As evidence came in from other parts of the world, it became apparent that the pattern in west Europe and northern America was not typical, especially with respect to large cities. Although there are some exceptions, the developing world presents two main patterns: the Latin American one, in which there is a predominance of females among migrants to cities and the Afro-Asian one, in which there is a clear predominance of men. In some large Latin American cities there are among young adults as few as 75 males for every 100 females; in a number of large African and Asian cities there are as many as 150 or more males for every 100 females. In part the explanation of this difference may be cultural. In Islamic societies and others such as India, unmarried females are not encouraged to leave the household except for marriage. Morris (33) also argues that the joint family restricted the migration of women, for women usually migrated only when whole families moved. In Latin America manv unmarried female mi-clude that many men in rural areas are there not particularly because they want to be, but because they correctly perceive that job opportunities in large cities for men over 35 or 40 are quite limited. In large cities of developing countries the supply of unskilled labor invariably exceeds the demand, so employers understandably do not hire older men, especially since they are less educated as a group and have few specialized skills.